EP0741239B1 - Antriebsvorrichtung für Hilfsgeräte für eine Brennkraftmaschine für Fahrzeuge - Google Patents

Antriebsvorrichtung für Hilfsgeräte für eine Brennkraftmaschine für Fahrzeuge Download PDF

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Publication number
EP0741239B1
EP0741239B1 EP96303062A EP96303062A EP0741239B1 EP 0741239 B1 EP0741239 B1 EP 0741239B1 EP 96303062 A EP96303062 A EP 96303062A EP 96303062 A EP96303062 A EP 96303062A EP 0741239 B1 EP0741239 B1 EP 0741239B1
Authority
EP
European Patent Office
Prior art keywords
arm
motion
tensioner
valve
spool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96303062A
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English (en)
French (fr)
Other versions
EP0741239A2 (de
EP0741239A3 (de
Inventor
Richard Meckstroth
Gerard Toth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Werke GmbH
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Werke GmbH
Ford Motor Co Ltd
Ford Motor Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ford Werke GmbH, Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Werke GmbH
Publication of EP0741239A2 publication Critical patent/EP0741239A2/de
Publication of EP0741239A3 publication Critical patent/EP0741239A3/de
Application granted granted Critical
Publication of EP0741239B1 publication Critical patent/EP0741239B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F16H7/1218—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means of the dry friction type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F16H7/1236—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means of the fluid and restriction type, e.g. dashpot
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
    • F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
    • F16H7/129—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path with means for impeding reverse motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/06—Endless member is a belt
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0829—Means for varying tension of belts, ropes, or chains with vibration damping means
    • F16H2007/084—Means for varying tension of belts, ropes, or chains with vibration damping means having vibration damping characteristics dependent on the moving direction of the tensioner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • F16H2007/0851—Wedges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • F16H2007/0859—Check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0891—Linear path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion

Definitions

  • the present invention relates to a belt-driven automotive engine accessory drive system and means for tensioning such a system.
  • Drive systems for the front end accessories of automotive engines typically include a belt having a tensioning device for maintaining the belt in contact with all the pulleys of the system, including the drive pulley, which is usually attached to the crankshaft of the engine, as well as with a plurality of driven pulleys, with at least one driven pulley attached to each rotating accessory.
  • Such accessories frequently include an alternator, a power steering pump, an air conditioning compressor, a secondary air pump for emission controls, as well as other types of rotating devices.
  • European Patent Application No. 676537 A1 (prior art under Article 54(3) EPC) describes an accessory drive system for an automotive engine including a drive pulley attached to an output shaft of the engine and a flexible drive belt for connecting the drive pulley with driven pulleys.
  • a tensioner maintains the drive belt in contact with each of the drive and driven pulleys.
  • the tensioner includes an arm which is rotatably mounted to the engine which has a wheel for contacting the drive belt.
  • the wheel is urged into contact with the drive belt by the arm, with the tensioner further including a governor for controlling rotational motion of the arm with the arm being able to rotate freely in the direction in which tension of the drive belt is increased, with said governor resisting motion of the arm in the direction in which tension in the drive belt is increased, with said governor resisting motion of the arm in the direction in which tension of the drive belt is decreased.
  • a governor for controlling rotational motion of the arm with the arm being able to rotate freely in the direction in which tension of the drive belt is increased, with said governor resisting motion of the arm in the direction in which tension in the drive belt is increased, with said governor resisting motion of the arm in the direction in which tension of the drive belt is decreased.
  • tensioners utilise elastic force provided by, for example, a flat wire spring for maintaining a tensioning pulley in contact with the drive belt.
  • a pulley is shown as item No. 34 in Figure 1 of the present application.
  • damped tensioners have been used to some extent in automotive front end accessory drive systems, such tensioners typically are symmetrical in their damping characteristics. In other words, motion of the tensioner is damped both in the direction toward the belt and away from the belt.
  • the tensioner is set up with a fairly low damping rate so as to allow the tensioner wheel to be compliantly in contact with the belt, the tensioner will be allowed to pull away from the belt in the event that the following series of events occurs within the accessory drive system.
  • FIG. 6 of the accompanying drawings illustrates a problem with conventional tensioners which is solved by a tensioner according to the present invention.
  • Operation of a front end accessory drive system with a corrective tensioner according to the present invention is shown in Figure 7. Both plots illustrate the rotational speed or angular velocity of an engine's alternator, idler pulley, and crankshaft pulley.
  • the rotational speed of the idler pulley is a direct indicator of the speed of the drivebelt because it is assumed for the purpose of this discussion that minimal slip occurs between the idler pulley and the drivebelt; this is a good assumption because the rotating inertia of the idler pulley is relatively slight as compared with the rotational inertia of the other components of the engine's front end accessory drive system, particularly the alternator. As shown in both plots, crankshaft rpm decreases at a very high rate in the situation being considered.
  • crankshaft may decelerate at a rate approaching 20,000 rpm per second.
  • These high deceleration rates cause the front end accessory drivebelt to slip on one or more pulleys, particularly the crankshaft pulley, thereby giving an objectionable squealing noise which will be audible to the driver of the vehicle.
  • the squealing noise produced by the loose drivebelt slipping on the crank pulley is caused by an overrunning effect of the alternator.
  • Figures 6 and 7 show rotational speed data produced during tests in which an instrumented engine was rapidly decelerated from a high rate of speed.
  • Figure 6 illustrates the behaviour of a prior art system
  • Figure 7 illustrates a system according to the present invention.
  • FIG. 7 shows the results of the use of a tensioner and control system according to the present invention.
  • the tensioner has a governor for controlling the rotational motion of the tensioner arm such that the tensioner's arm will be freely able to rotate toward the drivebelt, while movement of the arm and tensioner wheel away from the drivebelt is resisted.
  • An accessory drive system for an automotive engine includes a drive pulley attached to an output shaft of the engine, a flexible drivebelt for connecting the drive pulley with a plurality of driven pulleys, with one driven pulley located on each of a plurality of driven devices, and a tensioner for maintaining the drivebelt in contact with each of the drive and driven pulleys.
  • the tensioner comprises an arm which is rotatably mounted to the engine and which has a wheel for contacting the drivebelt, with the wheel being urged into contact with the drivebelt by the arm, and with the tensioner further comprising a hydraulic governor having a sliding valve for hydraulically damping rotational motion of the arm such that at relatively lower rotational speeds of the arm motion of the arm will be damped equally in both directions, but at higher rotational speeds, motion of the arm away from the drive belt will be resisted by a hydrostatic lock within the governor.
  • the hydraulic governor comprises a hydraulic strut interposed between said tensioner arm and a mounting surface fixed to the engine adjacent the tensioner such that linear motion of the strut accompanies rotational motion of the arm, with the strut including a connecting rod portion having a piston attached thereto, a housing having a cylinder bore, with the piston and connecting rod extending slidably within the cylinder, and a valve body mounted in a valve bore within the housing, with a first passage extending from the compression end of the cylinder to the valve bore, and a second passage extending from the extension end of the housing to the valve bore.
  • a sliding valve is mounted for reciprocal motion within the valve body such that motion of the piston and connecting rod at low velocities are equally damped, but motion of the piston and connecting rod at high speeds is resisted by closure of the passage extending from the compression end of the cylinder to the valve bore.
  • the sliding valve preferably comprises a spool valve mounted within the valve body such that pressure within the first passage will be applied to a piston end of the spool, so as to urge the spool into a position in which flow between the first and second passages is cut off.
  • the spool valve employed in the preferred embodiment of the present invention includes a generally cylindrical body having an annular groove located on its cylindrical surface, with the annular groove indexing with and allowing fluid communication between ports connected with the first and second passages during lower rotational speeds of the arm, with the spool being urged to a position in which the annular groove is not indexed with said ports whenever pressure applied to the piston end of the spool exceeds a predetermined value, thereby preventing flow between the ports.
  • FIG. 1 illustrates an automotive type internal combustion engine front end accessory drive system according to the present invention.
  • Flexible drivebelt 12 which is driven by pulley 10 attached to the engine's crankshaft, powers a series of rotating accessories which may include an alternator, a power steering pump, an air conditioning compressor, a water pump, an air pump to operate an emission control system, or other rotating accessories known to those skilled in the art.
  • alternator 14 which, due to its high rotational inertia, would normally create a problem which is solved by a tensioner according to the present invention.
  • Tensioner 18 maintains drivebelt 12 in contact with each of driven pulleys 16, as well as drive pulley 10, so that squealing or other objectionable noises will not occur. This is accomplished by maintaining proper tension in belt 12 at all times.
  • FIGs 2, and 3 illustrate a general example of a hydraulic strut type of tensioner governor.
  • strut 24 is attached to bracket 26 which is rigidly mounted to front surface 28 of the engine.
  • Strut 24 is attached to bracket 26 by means of mounting pin 32.
  • the strut has connecting rod 30 having a free end which is pivotally mounted to tensioner arm 20 at pivot point 21.
  • Hydraulic strut 24 also has piston 36 mounted upon connecting rod 30. Piston 36 slides within cylinder bore 38 while following the rotational motion of arm 20.
  • motion of arm 20 away from drivebelt 12 is accompanied by upward motion of connecting rod 30 toward the mounting end of strut 24 at point 32.
  • motion of arm 20 in the direction toward drivebelt 12 is accompanied by motion of connecting rod 30 away from the mounting end of the strut.
  • Motion of connecting rod 30 and piston 36 in a direction in which slack in the drivebelt is decreased i.e., motion in which piston 36 is moving in the direction in which connecting rod 30 extends to a greater extent from cylinder 38, is substantially uninhibited because hydraulic oil within the cylinder is free to flow through low pressure passage 42, and after unseating check ball 44 from its seat, can freely flow to the upper side of cylinder 38 after having moved past check ball 44.
  • check ball 44 is maintained on its seat by spring 48, which can be relatively light, movement of piston 36 and connecting rod 30 in a downward direction so as to accompany increasing tension in belt 12 is relatively uninhibited. If, on the other hand, the engine slows down precipitously so that alternator 14 would tend to pull arm 20 in the direction of decreased tension in belt 12, piston 36 would be forced in an upward direction, and the flow of hydraulic fluid from cylinder 38 would be through port 50 in the top of cylinder 38 and past a metering screw. High pressure passage 40, which allows fluid to flow from the cylinder and past a metering orifice or alternatively, by another type of metering device suggested by this disclosure. Accordingly, motion of piston 36 is essentially restricted by the hydrostatic force built up within cylinder 38.
  • strut 24 will prevent tension on drivebelt 12 from being released due to the overrunning condition caused by alternator 14 or by any other overrunning accessory, for that matter, thereby preventing drivebelt 12 from slipping on any of the drive or driven pulleys.
  • FIGs 4-5 and 8 illustrate a preferred embodiment of strut 24 according to the present invention, in which the flow of hydraulic fluid to and from cylinder 38 is controlled by a spool valve.
  • Figure 4 shows strut 24 in the locked condition;
  • Figure 8 shows strut 24 in the unlocked, or normal condition.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)

Claims (3)

  1. Ein Hilfsantriebssystem für einen Fahrzeugmotor bestehend aus:
    einer Antriebsriemenscheibe (10), die mit einer Ausgangswelle des Motors verbunden ist;
    einem flexiblen Antriebsriemen (12) zur Verbindung der Antriebsriemenscheibe mit einer Vielzahl von angetriebenen Riemenscheiben (16), mit einer angetriebenen Riemenscheibe, die sich auf jeder der zahlreichen angetriebenen Vorrichtungen befindet; und
    einer Zugfeder (18) um den Antriebsriemen (12) mit jeder der besagten Antriebs- und angetriebenen Riemenscheiben in Kontakt zu halten, wobei die besagte Zugfeder (18) einen Arm (20) enthält, der rotierbar auf dem Motor montiert ist und der ein Rad hat, um den Antriebsriemen (12) zu kontaktieren, wobei das Rad (34) in Kontakt mit dem Antriebsriemen (12) durch den Arm (20) gezwungen wird und wobei die besagte Zugfeder ausserdem einen hydraulischen Regler (24) enthält, um die Rotationsbewegung des Arms (20) hydraulisch zu dämpfen, so dass bei verhältnismässig niedrigeren Drehgeschwindigkeiten des Arms (20) die Bewegung des Arms in beide Richtungen gleichmässig gedämpft werden wird, aber dass bei höheren Drehgeschwindigkeiten der Bewegung des Arms (20) in der Richtung vom Antriebsriemen (12) weg durch eine hydrostatische Verriegelung innerhalb des Reglers (24) Widerstand geleistet wird;
    wobei der besagte hydraulische Regler eine hydraulische Strebe (24) enthält, die sich zwischen dem besagten Zugfederarm (20) und einer Befestigungsoberfläche (28) befindet, die am Motor in der Nähe der Zugfeder (18) angebracht ist, so dass die lineare Bewegung der Strebe (24) die Rotationsbewegung des Arms (20) begleitet, wobei die besagte Strebe (24) enthält:
    eine Verbindungsstange (30) mit einem Kolben (36), der an ihr befestigt ist und wobei ein Ende (21) der besagten Verbindungsstange (20) an dem besagten Zugfederarm (20) befestigt ist;
    ein Gehäuse mit einer Zylinderbohrung (38), wobei sich der Kolben (36) und die Verbindungsstange (30) seitwärts im Zylinder (38) erstrecken;
    einen Ventilkörper (80), der in einer Ventilbohrung im Gehäuse montiert ist, wobei sich ein erster Durchgang (84) vom Kompressionsende (38A) des Zylinders (38) zur Ventilbohrung erstreckt und ein zweiter Durchgang (85) sich vom Ende der Zugfeder (38B) des Gehäuses zur Ventilbohrung erstreckt; und
    einen Muffenschieber (86), der für wechselweise Bewegung im Ventilkörper (80) montiert ist, als ein Ergebnis des hydraulischen Drucks im Zylinder (38), so dass die Bewegung des Kolbens (36) und der Verbindungsstange (30) bei niedrigen Geschwindigkeiten ebenfalls durch hydraulischen Druck im Zylinder (38) gedämpft wird, aber der Bewegung des Kolbens (36) und der Verbindungsstange (30) bei hohen Drehzahlen durch das Schliessen des Durchgangs (84) ein Widerstand entgegengesetzt wird, wobei sich der Durchgang vom Kompressionsende (38A) des Zylinders (38) zur Ventilbohrung durch die Bewegung des Muffenschiebers (86) erstreckt.
  2. Ein Hilfsantriebssystem nach Anspruch 1, in dem der Muffenschieber (86) ein Steuerventil (86) enthält, das im Ventilkörper (80) montiert ist, so dass Druck im ersten Durchgang (84) auf ein Kolbenende des Steuerventils (86) ausgeübt wird, um das Steuerventil (86) in eine Stellung zu zwingen, in der die Strömung zwischen dem ersten (84) und dem zweiten (85) Durchgang abgestellt ist.
  3. Ein Hilfsantriebssystem nach Anspruch 2, in dem das besagte Steuerventil (86) einen im allgemeinen zylinderförmigen Körper enthält, mit einer ringförmigen Nute (88), die sich auf dessen zylinderförmiger Oberfläche befindet, wobei die besagte ringförmige Nute (88) mit den Öffnungen (90, 92) kommuniziert und die Flüssigkeitsströmung zwischen ihnen ermöglicht, die Öffnungen sind mit dem ersten (84) und dem zweiten (85) Durchgang während der niedrigeren Drehgeschwindigkeiten des Arms verbunden, wobei das besagte Steuerventil (86) die Strömung zwischen den Öffnungen (90, 92) jedesmal verhindert, wenn der auf das Kolbenende des Steuerventils (86) ausgeübte Druck einen vorbestimmten Wert übersteigt, mit dem Ergebnis dass das Steuerventil (86) in eine Stellung gezwungen wird, in der die ringförmige Nute (88) nicht mit den besagten Öffnungen (90, 92) kommuniziert.
EP96303062A 1995-05-05 1996-05-01 Antriebsvorrichtung für Hilfsgeräte für eine Brennkraftmaschine für Fahrzeuge Expired - Lifetime EP0741239B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/437,103 US5531648A (en) 1994-04-04 1995-05-05 Accessory drive system for an automotive engine
US437103 1995-05-05

Publications (3)

Publication Number Publication Date
EP0741239A2 EP0741239A2 (de) 1996-11-06
EP0741239A3 EP0741239A3 (de) 1996-11-20
EP0741239B1 true EP0741239B1 (de) 2000-03-22

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EP96303062A Expired - Lifetime EP0741239B1 (de) 1995-05-05 1996-05-01 Antriebsvorrichtung für Hilfsgeräte für eine Brennkraftmaschine für Fahrzeuge

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Country Link
US (1) US5531648A (de)
EP (1) EP0741239B1 (de)
DE (1) DE69607237D1 (de)

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US6609988B1 (en) 2001-05-24 2003-08-26 The Gates Corporation Asymmetric damping tensioner belt drive system
US7086373B2 (en) * 2002-11-01 2006-08-08 The Gates Corporation Damped accessory drive system including a motor/generator
DE60315071T2 (de) * 2002-12-16 2008-04-10 The Gates Corp., Denver Aktive spannvorrichtung
JP4051361B2 (ja) * 2004-08-06 2008-02-20 ジヤトコ株式会社 無段変速機の配置構造及びその製造方法
US7494434B2 (en) * 2005-06-15 2009-02-24 Gm Global Technology Operations, Inc. Belt alternator starter accessory drive with dual tensioner
FR2892483A3 (fr) * 2005-10-25 2007-04-27 Renault Sas Dispositif de mise en tension d'une courroie
US7194994B1 (en) * 2006-03-08 2007-03-27 Vintage Air, Inc. Bracket assembly for mounting accessories to the front of a small-block Ford motor
KR101405235B1 (ko) * 2013-07-18 2014-06-19 현대자동차 주식회사 유압식 타이밍 체인 텐셔너 및 타이밍 체인 장치

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CA1254770A (en) * 1985-03-19 1989-05-30 Yusuke Kinoshita Tensioner device in wrapping connector driving device for internal combustion engine
DE3805310A1 (de) * 1988-02-20 1989-08-31 Porsche Ag Spannvorrichtung fuer einen zahnriemen
JPH01229152A (ja) * 1988-03-05 1989-09-12 Tsubakimoto Chain Co 外部油圧によって解除されるロック機構を具えたテンショナ
JP2507172Y2 (ja) * 1990-05-31 1996-08-14 株式会社椿本チエイン 逆止弁を具えた歯付ベルト用テンショナ
US5131889A (en) * 1990-10-22 1992-07-21 Ford Motor Company Automotive engine accessory drive tensioner
US5256113A (en) * 1992-04-29 1993-10-26 Ford Motor Company Automotive accessory drive belt tensioner
US5304099A (en) * 1993-03-12 1994-04-19 Eaton Corporation Hydraulic chain tensioner
US5439420A (en) * 1994-04-04 1995-08-08 Ford Motor Company Accessory drive system for an automotive engine

Also Published As

Publication number Publication date
US5531648A (en) 1996-07-02
EP0741239A2 (de) 1996-11-06
DE69607237D1 (de) 2000-04-27
EP0741239A3 (de) 1996-11-20

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